Now showing items 1-10 of 771
Third body perturbation using a single averaged model considering elliptic orbits for the disturbing body
(Spaceflight Mechanics 2008, Vol 130, Pts 1 and 2, 2008-01-01) [Trabalho apresentado em evento]
In the present work, we expanded the study done by Solorzanol(1) including the eccentricity of the perturbing body. The assumptions used to develop the single-averaged analytical model are the same ones of the restricted ...
Universidade Aberta à Terceira Idade - ações intervencionistas do campus da Unesp de Guaratinguetá
(Congresso de Extensão Universitária, 2003) [Resumo]
(INTRODUÇÃO) A PROEX em 1993 convocou os diversos Campi a aderir ao “Programa Senior - UNESP Aberta á terceira Idade (UNATI)”, através de ações extensionistas próprias para pessoas adultas e da terceira idade, com o objetivo ...
Divulgação do vestibular unesp e inclusão social: cooperação secretaria de estado da educação/Vunesp/Unesp
(Congresso de Extensão Universitária, 2009) [Resumo]
A preliminary physicochemical, exergetic and economic study of hydrogen production utilizing glycerol
(AIChE 100 - 2008 AIChE Annual Meeting, Conference Proceedings, 2008-12-01) [Trabalho apresentado em evento]
This work has as objective to demonstrate technical and economic viability of hydrogen production utilizing glycerol. The volume of this substance, which was initially produced by synthetic ways (from oil-derived products), ...
Fatigue apparatus for geometrically complex non-standardized specimens
(Recent Patents on Mechanical Engineering, 2009-01-01) [Artigo]
Standard Test Methods (e.g. ASTM, DIN) for materials characterization in general, and for fatigue in particular, do not contemplate specimens with complex geometries, as well as the combination of axial and in-plane bending ...
A linearly tunable low-voltage CMOS transconductor with improved common-mode stability and its application to (gm)-C filters
(IEEE Transactions on Circuits and Systems Ii-analog and Digital Signal Processing, 2001-07-01) [Artigo]
A linearly tunable low-voltage CMOS transconductor featuring a new adaptative-bias mechanism that considerably improves the stability of the processed-signal common,mode voltage over the tuning range, critical for very-low ...
The effect of N+ ion energy on the properties of ion bombarded plasma polymer films
(Nuclear Instruments & Methods In Physics Research Section B-beam Interactions With Materials and Atoms, 2001-04-01) [Artigo]
This work describes the influence of the ion bombardment on the electrical, optical and mechanical properties of polymer films deposited from radio-frequency plasmas of benzene. Irradiations were conducted using N+ at 5 x ...
Comment on 'Relativistic extension of shape-invariant potentials'
(Journal of Physics A: Mathematical and General, 2002-07-26) [Carta]
This comment criticizes the recently published approach of Alhaidari for solving relativistic problems. It is shown that his gauge considerations are inaccurate and that the class of exactly solvable relativistic problems ...
Third-body perturbation in the case of elliptic orbits for the disturbing body
(Mathematical Problems in Engineering, 2008-01-01) [Artigo]
This work presents a semi-analytical and numerical study of the perturbation caused in a spacecraft by a third-body using a double averaged analytical model with the disturbing function expanded in Legendre polynomials up ...
A Discussion Related to Orbit Determination Using Nonlinear Sigma Point Kalman Filter
(Mathematical Problems in Engineering, 2009-01-01) [Artigo]
Herein, the purpose is to present a Kalman filter based on the sigma point unscented transformation development, aiming at real-time satellite orbit determination using GPS measurements. First, a brief review of the extended ...